<!DOCTYPE html>
<html>
<head>
  <style>
  textarea { height:25px; }
  </style>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

</head>
<body>

  <input type="radio" name="asdf" />21312
  <script>
  	$('input[name=asdf]:radio').click(function(){
            alert(1);
        })
  </script>
	</body>
</html>
